Product Description

Overview:

This is a power expansion Board especially designed for Raspberry Pi, which enables to use the Raspberry Pi with a moveable power source. It's more convenient to use external 3.7V Lithium battery or 3.7V 18650 Lithium battery;

Features:

- Supports I2S Output with Capacity & Voltage Reading Function (provide algorithms and examples)- Support Raspberry pi or Android & Apple Phone or Pad or other electronic device charging;- Supports charging while discharging,(Very stable, the maximum output current can up to 1.8A while charging, but the chip heat will become larger. maybe you can place a external heatsilk on clip.)- With 4 LED power indicator;- Standard dimension of Raspberry Pi HAT;- Two power supply modes: GPIO power output and USB power out;- Removable battery, The external lithium battery requirements: 3.7V lithium battery; (The battery is not included)

How to read the voltage capacity (percentage) estimated by the chip?# read the integer part of the battery percentage;sudo i2cget -y 1 0x62 0x4 bthe resulting value is 0x11;Converted to 10 decimalism is 17, then the remaining capacity is 17%;

#Read the fractional part of the battery percentage:sudo i2cget -y 1 0x62 0x5 bthe resulting value is 0x95;Converted to decimalism is 149;Then the fractional part is 149/256 = 0.58;